Question

Let f(x) =4 + 5x and g(x) 2x - 1 . Find f(g(x)) and g(f(x))

Answer 1

The answer to your question is:

a) 10x - 6

b) 7 - 10x

Explanation:

Data

f(x) = 4 + 5x

g(x) = 2x - 1

a) f(g(x)) = 4 + 5(2x -1)

= 4 + 10x -10

= 10x - 6

b) g(f(x)) = 2(4 + 5x) - 1

= 8 - 10x - 1

= 7 - 10x